<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- import CSS -->
    <link rel="stylesheet" href="https://cdn.staticfile.org/element-ui/2.15.9/theme-chalk/index.css">
</head>
<body>
<div id="app">
    <template>
        <!--@change 是下拉选中当值发生改变时的事件-->
        <el-select @change="f" v-model="value" placeholder="请选择">
            <!--label是展示给用户的内容   value是选中之后得到的值-->
            <el-option
                    v-for="item in options"
                    :label="item.label"
                    :value="item.label">
            </el-option>
        </el-select>
    </template>
    <h1>{{value}}</h1>
</div>
</body>
<!-- import Vue before Element -->
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<!-- import JavaScript -->
<script src="https://cdn.staticfile.org/element-ui/2.15.9/index.min.js"></script>
<script>
   let v = new Vue({
        el: '#app',
        data: function() {
            return {
                options: [{
                    value: '选项1',
                    label: '黄金糕'
                }, {
                    value: '选项2',
                    label: '双皮奶'
                }, {
                    value: '选项3',
                    label: '蚵仔煎'
                }, {
                    value: '选项4',
                    label: '龙须面'
                }, {
                    value: '选项5',
                    label: '北京烤鸭'
                }],
                value: ''
            }
        },
       methods:{
            f(){
                v.$message(v.value);
            }
       }
    })
</script>
</html>